Error in if (.) else { : the condition has length > 1

I am trying to group my data into three categories using the ifelse function.

Consider this hypothetical dataset and the application of ifelse:

a <- c(2,3,3,2)
b <- c(0,1,2,3)
df <- data.frame(a,b)

df %>%
if(a>2) {
print ('Hi')
} else if (a<3 & b<1) {
print ('Hello')
} else {
print ('Bye')
}

This error returned when I ran the code

Error in if (.) a>2 else { : the condition has length > 1

How should I fix it?

>Solution :

This works:

df %>%
  mutate(text = ifelse(a > 2, "Hi",
                       ifelse(a < 3 & b < 1, "Hello", "Bye")))
  a b  text
1 2 0 Hello
2 3 1    Hi
3 3 2    Hi
4 2 3   Bye